The Economic Times

US Transportation Department says air traffic system gave inconsistent data prompting shutdown

FAA flights grounded reason: US Transportation Secretary Sean Duffy reported that an overloaded air traffic control communications system led to a nationwide groundstop. This issue resulted in more than 10,000 flights being cancelled and delayed across the country. The system experienced inconsistent data due to overloaded switches and routers, prompting the decision to shut it down. Intermittent communication occurred along with intermittent radar problems which contributed to the disruption.